Looking into this onsen which has a large open air bath, which is mixed, and in the rules it mentions something about "paper trunks" available for men.
I have no idea what those are and i have not been able to find them searching.
The text literally says that:
"男性の方にはペーパートランクス"
Anybody knows what this is, or has been to this place and can give me more info about it? I thought you wouldn't enter an onsen with anything on.
by IgnominousComputer